In 1.6, DartCraft added 3 tiers of Treasure Cards, which drop from mobs killed by a Force Weapon enchanted with the Treasure Core. Each Tier card can be crafted into a 2x2 grid to get each tier of Spoils Bag. As of this addition, no mob will naturally drop a Spoils Bag.

Spoils Bags can be right-clicked on an inventory (e.g. a Chest) to dump items in that inventory.

The Spoils bag's design was inspired by the item from the video game The Legend of Zelda: The Wind Waker for the Nintendo Gamecube.